Changes docking in the following ways:
. Dock icons for window docking positions could go offscreen
before.
. It was possible to show the maximize indicator on the wrong
screen. This was because equals was not comparing the monitor bounds.
. Tweaks to color, size and animation from Glen.
BUG=none
TEST=make sure there are no bugs with docking tabs.
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=11391